From first shot to silence of peace: Timeline of World War I

ONE OF ONE HUNDRED PHOTOS WORLD WAR ONE CENTENARY TIMELINE-In this June 28, 1914 file photo, the Archduke of Austria Franz Ferdinand, center right, and his wife Sophie, center left, walk to their a car in Sarajevo. This photo was taken minutes before the assassination of the Archduke and his wife, an event which set off a chain reaction of events which would eventually lead to World War One. (AP Photo, File)

PARIS (AP) — Unleashed by an archduke’s assassination, World War I gradually entangled more and more countries, killing millions of soldiers and civilians and touching multiple continents. As the world marks 100 years since the…

PARIS (AP) — Unleashed by an archduke’s assassination, World War I gradually entangled more and more countries, killing millions of soldiers and civilians and touching multiple continents.

As the world marks 100 years since the fighting stopped, here is a look at some key moments in WWI: